/* 地图视图样式 */
.map-container {
  padding: 40px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

/* Part 区域样式 */
.part-section {
  margin-bottom: 48px;
}

.part-header {
  margin-bottom: 24px;
  padding: 16px 24px;
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
}

.part-header h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

/* 学习路径 - 类似 Duolingo 的蛇形路径 */
.learning-path {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
  padding: 20px 0;
}

/* 章节节点 - Duolingo 风格 */
.chapter-node {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 24px;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition);
  max-width: 500px;
  width: 100%;
  box-shadow: var(--shadow);
}

.chapter-node:hover {
  transform: translateY(-2px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
}

.chapter-node.locked {
  opacity: 0.5;
  cursor: not-allowed;
}

.chapter-node.locked:hover {
  transform: none;
  border-color: var(--border-color);
  box-shadow: var(--shadow);
}

.chapter-circle {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  flex-shrink: 0;
  position: relative;
  transition: var(--transition);
}

.chapter-circle.locked {
  background: #f4f4f5;
  border: 2px solid var(--border-color);
  color: #a1a1aa;
}

.chapter-circle.available {
  background: var(--primary-color);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
  color: #fff;
}

.chapter-circle.completed {
  background: var(--success-color);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
  color: #fff;
}

.chapter-circle.in-progress {
  background: var(--accent-color);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
  color: #fff;
}

.chapter-circle .chapter-icon {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: inherit;
}

.chapter-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 24px;
  height: 24px;
  background: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--success-color);
  font-weight: bold;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.chapter-info {
  flex: 1;
  min-width: 0;
}

.chapter-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chapter-progress {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chapter-progress .progress-bar {
  flex: 1;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.chapter-progress .progress-fill {
  height: 100%;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

.chapter-progress .progress-text {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
}

/* 章节容器 */
.chapter-section {
  margin-bottom: 60px;
  animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 章节标题 */
.chapter-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  padding: 20px 24px;
  background: linear-gradient(135deg, var(--card-bg), var(--bg-color));
  border-radius: var(--radius);
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow);
}

.chapter-header .chapter-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 4px 12px rgba(88, 204, 2, 0.3);
}

.chapter-info {
  flex: 1;
}

.chapter-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 4px;
}

.chapter-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

.chapter-progress {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chapter-progress-bar {
  width: 120px;
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  overflow: hidden;
}

.chapter-progress-fill {
  height: 100%;
  background: var(--primary-color);
  transition: width 0.5s ease;
}

.chapter-progress-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

/* 关卡网格 */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 24px;
  padding: 0 20px;
}

/* 关卡节点 */
.module-node {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  transition: var(--transition);
}

.module-node:hover {
  transform: translateY(-2px);
}

.module-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  position: relative;
  transition: var(--transition);
  box-shadow: var(--shadow-md);
}

.module-circle.locked {
  background: #f4f4f5;
  border: 2px solid var(--border-color);
  cursor: not-allowed;
}

.module-circle.available {
  background: var(--primary-color);
  animation: pulse 2s infinite;
}

.module-circle.completed {
  background: var(--success-color);
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.03);
  }
}

.module-node:hover .module-circle.available {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.module-label {
  margin-top: 12px;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  color: var(--text-secondary);
  max-width: 120px;
  line-height: 1.4;
}

.module-node:hover .module-label {
  color: var(--text-primary);
}

/* 关卡状态图标 */
.module-status {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* 连接线 */
.module-connector {
  position: absolute;
  width: 40px;
  height: 4px;
  background: var(--border-color);
  top: 50%;
  right: -20px;
  transform: translateY(-50%);
}

.module-connector.completed {
  background: var(--primary-color);
}

/* 章节分隔线 */
.chapter-divider {
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
  margin: 40px 0;
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.empty-state-icon {
  font-size: 64px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state-text {
  font-size: 18px;
  margin-bottom: 8px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .map-container {
    padding: 20px 10px;
  }
  
  .chapter-header {
    padding: 16px;
  }
  
  .chapter-icon {
    width: 48px;
    height: 48px;
    font-size: 24px;
  }
  
  .chapter-title {
    font-size: 20px;
  }
  
  .modules-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 16px;
    padding: 0 10px;
  }
  
  .module-circle {
    width: 64px;
    height: 64px;
    font-size: 24px;
  }
  
  .module-label {
    font-size: 12px;
    max-width: 100px;
  }
}